3 * Texas Instruments, <www.ti.com>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of
8 * the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #include <asm/arch/omap.h>
25 #include <asm/arch/clocks.h>
27 #include <asm/omap_common.h>
28 #include <asm/arch/mux_omap4.h>
33 extern const struct omap_sysinfo sysinfo;
36 void watchdog_init(void);
37 u32 get_device_type(void);
38 void do_set_mux(u32 base, struct pad_conf_entry const *array, int size);
39 void set_muxconf_regs_essential(void);
40 void set_muxconf_regs_non_essential(void);
41 void sr32(void *, u32, u32, u32);
42 u32 wait_on_value(u32, u32, void *, u32);
43 void sdelay(unsigned long);
44 void set_pl310_ctrl_reg(u32 val);
45 void omap_rev_string(char *omap_rev_string);
46 void setup_clocks_for_console(void);
48 void bypass_dpll(u32 *const base);
49 void freq_update_core(void);
50 u32 get_sys_clk_freq(void);
51 u32 omap4_ddr_clk(void);
52 void cancel_out(u32 *num, u32 *den, u32 den_limit);
53 void sdram_init(void);
54 u32 omap_sdram_size(void);
56 void init_omap_revision(void);
57 void do_io_settings(void);
59 * This is used to verify if the configuration header
60 * was executed by Romcode prior to control of transfer
61 * to the bootloader. SPL is responsible for saving and
62 * passing this to the u-boot.
64 extern struct omap_boot_parameters boot_params;
66 static inline u32 running_from_sdram(void)
69 asm volatile ("mov %0, pc" : "=r" (pc));
70 return ((pc >= OMAP44XX_DRAM_ADDR_SPACE_START) &&
71 (pc < OMAP44XX_DRAM_ADDR_SPACE_END));
74 static inline u8 uboot_loaded_by_spl(void)
77 * u-boot can be running from sdram either because of configuration
78 * Header or by SPL. If because of CH, then the romcode sets the
79 * CHSETTINGS executed bit to true in the boot parameter structure that
80 * it passes to the bootloader.This parameter is stored in the ch_flags
81 * variable by both SPL and u-boot.Check out for CHSETTINGS, which is a
82 * mandatory section if CH is present.
84 if ((boot_params.ch_flags) & (CH_FLAGS_CHSETTINGS))
87 return running_from_sdram();
90 * The basic hardware init of OMAP(s_init()) can happen in 4
92 * 1. SPL running from SRAM
93 * 2. U-Boot running from FLASH
94 * 3. Non-XIP U-Boot loaded to SDRAM by SPL
95 * 4. Non-XIP U-Boot loaded to SDRAM by ROM code using the
96 * Configuration Header feature
98 * This function finds this context.
99 * Defining as inline may help in compiling out unused functions in SPL
101 static inline u32 omap_hw_init_context(void)
103 #ifdef CONFIG_SPL_BUILD
104 return OMAP_INIT_CONTEXT_SPL;
106 if (uboot_loaded_by_spl())
107 return OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL;
108 else if (running_from_sdram())
109 return OMAP_INIT_CONTEXT_UBOOT_AFTER_CH;
111 return OMAP_INIT_CONTEXT_UBOOT_FROM_NOR;
115 static inline u32 omap_revision(void)
117 extern u32 *const omap4_revision;
118 return *omap4_revision;